Effects of a flux-coupling type superconducting fault current limiter on the surge current caused by closed-loop operation in a 10kV distribution network

Chen, Lei; Li, Zhe; Deng, Changhong; Lv, Hui; Weng, Yixuan; Xu, Qiao; Wu, Zhikui; Tang, Yuejin

doi:10.1016/j.ijepes.2015.01.007

Cited by 12 publications

(8 citation statements)

References 25 publications

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“…From Equation (16), the IM speed reduces exponentially with the time, and the corresponding time constant is 1/m1. If the fault clearance time is more than 1/m1, the rotational speed might settle at another stable rotational speed provided that the mechanical load torque is lower than the maximum torque given from the IM torque-speed characteristics in the fault condition.…”

Section: Fault Characteristic Of the Power Loadsmentioning

confidence: 99%

“…Since the SFCL parameters are respectively set as L 1 = 50 mH and R sc = 10 Ω, L 1 = 70 mH and R sc = 30 Ω, L 1 = 90 mH and R sc = 50 Ω, the fault current's peak value can be respectively suppressed to 180 A, 117 A, 89 A, and the current-limiting ratio is about 75.7%, 84.2%, 88%. Figures [16][17][18][19] show the DG voltage, exchange power and frequency fluctuations of the micro-grid system under the internal fault. From these figures, the positive effects of the two SFCLs can be observed.…”

Section: Simulations Of the Internal Fault (F2 Point)mentioning

confidence: 99%

“…Since the power Load 1 is shorted, the decrease of the exchange power and the full utilization of the local DG units can help to achieve the power balance. In addition, taking the enhancement of the micro-grid's frequency stability as an example, employing the SFCLs can make Figures [16][17][18][19] show the DG voltage, exchange power and frequency fluctuations of the micro-grid system under the internal fault. From these figures, the positive effects of the two SFCLs can be observed.…”

Section: Simulations Of the Internal Fault (F2 Point)mentioning

confidence: 99%

“…There are many remarkable merits, including: sub-cycle operation in response to faults; reduced damage at the point of fault; and critical protection of relevant power equipment [14][15][16][17][18][19]. Currently, some basic research works have been done to promote the application of one or more SFCLs in a micro-grid.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

Chen

et al. 2016

Energies

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Abstract:Concerning the development of a micro-grid integrated with multiple intermittent renewable energy resources, one of the main issues is related to the improvement of its robustness against short-circuit faults. In a sense, the superconducting fault current limiter (SFCL) can be regarded as a feasible approach to enhance the transient performance of a micro-grid under fault conditions. In this paper, the fault transient analysis of a micro-grid, including distributed generation, energy storage and power loads, is conducted, and regarding the application of one or more flux-coupling-type SFCLs in the micro-grid, an integrated technical evaluation method considering current-limiting performance, bus voltage stability and device cost is proposed. In order to assess the performance of the SFCLs and verify the effectiveness of the evaluation method, different fault cases of a 10-kV micro-grid with photovoltaic (PV), wind generator and energy storage are simulated in the MATLAB software. The results show that, the efficient use of the SFCLs for the micro-grid can contribute to reducing the fault current, improving the voltage sags and suppressing the frequency fluctuations. Moreover, there will be a compromise design to fully take advantage of the SFCL parameters, and thus, the transient performance of the micro-grid can be guaranteed.

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Section: Fault Characteristic Of the Power Loadsmentioning

confidence: 99%

Section: Simulations Of the Internal Fault (F2 Point)mentioning

confidence: 99%

Section: Simulations Of the Internal Fault (F2 Point)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

Chen

et al. 2016

Energies

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“…At present, owing to the unique technical advantages of superconducting materials (Malginov et al 2013a, b; Guan et al 2015), superconducting fault current limiters (SFCLs) can be thought of as the highly competitive auxiliary devices to assist the electric power systems against short-circuit faults. On this background, lots of research works have been carried out, and different kinds of SFCLs have been proposed (Didier and Lévêque 2014; Firouzi et al 2015; Chen et al 2015a, b; Martini et al 2015; Reiss 2015). …”

Section: Introductionmentioning

confidence: 99%

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Chen

Yang

et al. 2016

SpringerPlus

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The modified flux-coupling-type superconducting fault current (SFCL) is a high-efficient electrical auxiliary device, whose basic function is to suppress the short-circuit current by controlling the magnetic path through a high-speed switch. In this paper, the high-speed switch is based on electromagnetic repulsion mechanism, and its conceptual design is carried out to promote the application of the modified SFCL. Regarding that the switch which is consisting of a mobile copper disc, two fixed opening and closing coils, the computational method for the electromagnetic force is discussed, and also the dynamic mathematical model including circuit equation, magnetic field equation as well as mechanical motion equation is theoretically deduced. According to the mathematical modeling and calculation of characteristic parameters, a feasible design scheme is presented, and the high-speed switch’s response time can be less than 0.5 ms. For that the modified SFCL is equipped with this high-speed switch, the SFCL’s application in a 10 kV micro-grid system with multiple renewable energy sources are assessed in the MATLAB software. The simulations are well able to affirm the SFCL’s performance behaviors.

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Research on Active Distribution Network Monitoring and Police Method of Substation Based on Fault Tree

Hao

Zhenbao

Zhang

et al. 2019

J. Phys.: Conf. Ser.

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Substation is a power facility for transforming voltage, receiving and distributing power, controlling power flow and adjusting voltage in power system. After the active distribution network fails, it can effectively improve the power supply reliability of the distribution network by comprehensively utilizing the islanding operation ability of the standby contact line and the internal DG to restore the power supply for the outage load after the failure. Considering the main transformer fault and the timing characteristics of the DG output, the fault point is located in the shorter section between the intelligent bodies through the initial fault location. The fault secondary point is used to determine the fault point and the switch on both sides of the fault point is disconnected. Isolating the fault zone and restoring the power supply of the non-faulty section. It is an important technical measure to ensure that the voltage of each node in the power grid meets the required constraints, accurately locate the fault point, and ensure the reliable operation of the power grid.

show abstract

Effects of a flux-coupling type superconducting fault current limiter on the surge current caused by closed-loop operation in a 10kV distribution network

Cited by 12 publications

References 25 publications

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

Technical Evaluation of Superconducting Fault Current Limiters Used in a Micro-Grid by Considering the Fault Characteristics of Distributed Generation, Energy Storage and Power Loads

Conceptual design of a high-speed electromagnetic switch for a modified flux-coupling-type SFCL and its application in renewable energy system

Research on Active Distribution Network Monitoring and Police Method of Substation Based on Fault Tree

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